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4M-8239 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4M-8239: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 54.0 MILLIMETERS NOMINAL MM, length: 79.85 MILLIMETERS NOMINAL MM, material: STEEL, body_radius: 27.0 MILLIMETERS NOMINAL MM, corner_radius: 9.7 MILLIMETERS NOMINAL MM, hole_diameter: 10.5 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-160-2240, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4M-8239
NSN: 5340-01-160-2240
FSC: 5340 — Hardware, Commercial
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
width54.0 MILLIMETERS NOMINAL MM
length79.85 MILLIMETERS NOMINAL MM
materialSTEEL
body_radius27.0 MILLIMETERS NOMINAL MM
corner_radius9.7 MILLIMETERS NOMINAL MM
hole_diameter10.5 MILLIMETERS NOMINAL MM
body_thickness9.0 MILLIMETERS MINIMUM AND 10.0 MILLIMETERS MAXIMUM MM
peripheral_shape_styleDIAMOND, ROUNDED CORNERS, TWO HOLES
cross-sectional_shape_styleFLAT
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_holes_along_length60.45 MILLIMETERS NOMINAL MM
material_document_and_classification1E357,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE
NSN5340-01-160-2240
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4M-8239 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER RADIUS: 9.7 MILLIMETERS NOMINAL MM
•
LENGTH: 79.85 MILLIMETERS NOMINAL MM
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 60.45 MILLIMETERS NOMINAL MM
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: 1E357,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
BODY RADIUS: 27.0 MILLIMETERS NOMINAL MM
•
PERIPHERAL SHAPE STYLE: DIAMOND, ROUNDED CORNERS, TWO HOLES
TECHNICAL CHARACTERISTICS
CORNER RADIUS9.7 MILLIMETERS NOMINAL MM
LENGTH79.85 MILLIMETERS NOMINAL MM
DISTANCE BETWEEN HOLES ALONG LENGTH60.45 MILLIMETERS NOMINAL MM
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATION1E357,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEFLAT
BODY RADIUS27.0 MILLIMETERS NOMINAL MM
PERIPHERAL SHAPE STYLEDIAMOND, ROUNDED CORNERS, TWO HOLES
WIDTH54.0 MILLIMETERS NOMINAL MM
MATERIALSTEEL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4M-8239?
4M-8239 is a COVER,ACCESS.
What is the NSN for 4M-8239?
4M-8239 is cataloged in the U.S. Government catalog under NSN 5340-01-160-2240. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.